And carefully start mashing butter into flour with a fork
Until all butter is mashed into pieces not bigger than a pea
Add cooled down kefir
And carefully mix kefir into flour and dough mix
Until you get more or less cohesive dough, put bowl with dough to freezer for 20 mins; turn oven on to warm it up to 450F
Turn dough out to a wooden board lightly dusted with flour; knead it dough with a few light strokes, don’t overheat it
Even dough with hands about 1.5inches thick
Then using biscuit cutter or a glass about 3 inches in diameter cut dough into circles; mix cut off dough together and repeat procedure; you will get about 8 pieces
Transfer dough pieces to a cookie sheet lined up with parchment paper and put to the oven for 10 mins on 450F